Punching-machine.



E. B. STI'MPSON.

PUNCHING MACHINE.

APPLIOATION FILED MAY 13, 1912.

1 052527. I Patented Feb. '11, 1913.

Ill "l I Inve tor.-

I by I any given'position of said adjustment by over an opening throu' the sub-press to permlt the punchmgs to 1 -nnwrn-rnannsrmrson, or snooxnvmnnwfroam l1. w IPUNCHING-MACHiNE.

r A plication Med May To all whom it may come/ n."

Be it known that'I, EDWIN-B, S'rnvrPsoN, a citizen of theUnitedStatesf residing at Brooklyn, in the county of Kings and State of New f York, have invented "certain new and useful Improvementsin' Punching-Ma- "chin'es 'of which the following is a specification."-

My present invention relatesto a punching machine' and more particularly to means for the ready adj ustment-o'f the "punches ot the machineand for their'attachment and detachment relative to the 5 cross-head. The machine on which I usethi's improvement is that heretofore patented 'tome in United States Patent No. 978,506ot December 13, 1910;]. V l

The features and'advantages of my present improvement will be understood by those skilled in'the art from' an understanding of the following'description'in connection with the drawings These show only one of the specific embodimentswhich my invention is adapted to take and in them Figure 1 is a fragmentary transverse vertical section through-the cross-head and bed plate of apunching machincisimilar to that of myvaforesaid earlier patent; showing one ofthe sub-presses and punches'in side elevation and further showing' my improved means for attaching'the individual punches to the cross-head;.'Fig. 2 is a detail fragmentary view on a largerv scale looking from left to right at the-upper portion-of Fig. 1; and Fig. 3 is a vertical section 'on the line 3-3 in Fig. 2 looking in the direction of the arrows. 5'

Describing now the specific, devices of the drawings: 1 is the bed platefot', the machine having a longitudinal trough 2 whose rear wall 3 is lower thanits frontwall 4. i

5 is one of the sub p'resses'having a general gooseneck shape. 'Its lower'arm has projection 6 receivable between-thesi'des of the justed along this trough and then lockedin means shown in my earlier patent.

7 is a die suitably mounted in the lower arm of the sub-press, the axis of the die being vertical and said die being located h the lower arm of dro through as in thy earlier'patent.

The upper arm of t-he sub-press is pro-' trough 2. Said sub-presses can be ad-' H i specification of Letters Patent. a i i 11,7411913' 13, I i l v 1912. SeriaI No. 696,804.

vided with a sleeve. 8 which guides. the punch 9 for reciprocation in operative vertical ali'nement with the die 7 V i j 10 is the cross-headv of themachinefrom which the punch or punches 9' are suspended, said cross-'hea'd'being in turn operatively supported for vertical reciprocation toward and away from the bed plate of themaehine as in my earlier patent. I Referring now more particularly "to my present improvements '11 is "a ribhaving a dovetail cross section secured lengthwise to the bottom of the cross-headfby 'bolts 1 13' is a slide which is slidably suspended from the rib 11 and forthis purpose'has a recess in its top which fits the dovetail cross 13 and, whereasthe drawings sho'w only one sub-pressv 5, one punch 9 and one slide 13', it will be-understood that there maybe a plurality of sets of these parts ineach machine as shown in my earlier patent. a y

The bottom of each slide 13'has an internally threaded hole apped vertically up into it to receive an adjustment screw 14 whose head is located over the upper end of the punch 9.

15 is a set screw let in through the front of the slide 13 to engage the adjustment screw 14 and lock it in any given positionof adjustment. I

16 is a round trunnionpin-in a hole which extends through the slide 13from end to end and which 'pa'sses"through the upper 7 end of the vertical holethatcontains the adjustment screw 14. This pin-16 is long so as to provide proje'cting ends or trun nions at the end of the slide 13. Said pin 16 is prevented from becoming displaced endwise by' a cotter pinll' passed through a suitable hole extending from" from: to back. through the slide 13 and intermediately through a, hole-in the trunnion pin 16. (com? pare Fig. 3).

18 isa member in the form of a pair of hooks 19 in spaced apart side by side relation connected at the bottom" by a cross- 18 depends from the slide. a The upper;end' of the punch 9 has an anhook-member nularrecess a; provide a reduced nee-1:21.

modatethe head 2401 the punch when its neck 21 is contained in the aforesaid recess 22 (Fig. 2). Thus it Will be noted that these recesses 21 and 23 in the cross-piece 20 provide a projection or step 25 which engages the underside ofthe head 24 of the punc 1.

The operationis as follows; When the parts have been assembled as shown and described, the up and down reciprocation of the cross-head 10 carries, the punch 9 with it by reason of the connecting means comprising the slide 13 and the hook-member 18. This connectingmeans permits lateral play and mutual accommodation of the parts so that there is no tendency to jam the punch in its guide sleeve 8. I

The screws 14 inthe respective slides 13 on the given machine are adjusted by unscrewing-the brass set screws 15 .and then applying a screw driver to. the slot 14? in the head of each screw 14:. The object of the adjustment of the several screws 14 is to make the heads of all of them bear simultaneously on 'the heads of the punches which can beaccomplished by adjusting the several screws to project for a greater or less distance below their sockets depending upon the differences in the length of the punches due to wear, sharpening or otherwise.

The hook-member 18 obviously permits the punches to be inserted and removed very easily .by the mere swinging of the member about its trunnions.

What I claim is: V

.1. In apunching machine the combination of a vertically reciprocating cross-head. a suitably guided punch having a reduced neck at its upper end, and connecting means between said cross-head and'punch comprising a member supported from. the cross-head havinga pivoted hook-member which engages the reduced neckof the punch.

2. In a punching machine the combination of a vertically reciprocating cross-head, a suitably guidedpunch. having a reduced neck atvits upper end, and connecting means between said cross-head and punch comprising a member supported from the cross-.

a suitably guided punch having a reduced neck at its upper end, and connecting means between said cross-head and punch comprising a slide which is slidably supported from the bottom of the cross-head, said slide having a pivoted hook-member depending therefrom whose lower or free end straddles the neck portion of the punch and projects under its head.

4. In a punching machine the combination of a vertically reciprocating cross-head, a suitably guided punch having a reduced neck at its upper end, and connecting means between said cross-head and punch coin rising a slide which is slidably supported rom the bottom of the cross-head, said slide having a pivoted hook-member depending therefrom whose lower or free end straddles the neck portion of the punch and projects under its head, the bottom of said slide over the head of the punch having a vertical screw-threaded opening, and an adjusting screw in said opening.

5. In a punching machine the combination of a vertically reciprocating crossfhead, a suitably guided punch having a reduced neck at its upper end, a slide which is slidably supported from the bottom of the crosshead, and a hook-member comprising a pair of hooks which at their upper ends straddle the slide and are pivotally connected there- 'withand whose, lower ends depend below the bottom of the slide'and are connected by a cross-piece, said lower portion of the hookmember straddling the reduced neck of the ,p11nch and extending underneath its head. In testimony whereof I aflix my signature in presence of two witnesses.

EDWIN BALL STIMPS ON.

' Witnesses E. W. SCHERR, Jr., ALAN C. MCDONNELL.

Copies of thi s patent may be obtained for five cents'each, by addressing the Commissioner of Batents,

' Washington, D. G. 

